Prof. Ryuji Morita Profile

Prof. Ryuji Morita

Professor at Hokkaido Univ

SPIE Involvement:

Conference Program Committee | Author

Proceedings Article | 17 March 2023 Presentation

Metallic microdots patterning with laser-induced forward transfer

Haruki Kawaguchi, Kanta Takahashi, Rong Wei, Keisaku Yamane, Ryuji Morita, Ken-ichi Yuyama, Satoyuki Kawano, Katsuhiko Miyamoto, Nobuyuki Aoki, Takashige Omatsu

Proceedings Volume PC12408, PC124080H (2023) https://doi.org/10.1117/12.2651259

KEYWORDS: Optical lithography, Optical vortices, Wavefronts, Nanoparticles, Inkjet technology, Gold, Spatial resolution, Pulsed laser operation, Printing, Photonics

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Proceedings Article | 8 December 2022 Paper

Direct print of close-packed gold nanoparticle microdots with optical vortex illumination

Haruki Kawaguchi, Kanta Takahashi, Rong Wei, Keisaku Yamane, Ken-ichi Yuyama, Satoyuki Kawano, Ryuji Morita, Nobuyuki Aoki, Katsuhiko Miyamoto, Takashige Omatsu

Proceedings Volume 12479, 124790J (2022) https://doi.org/10.1117/12.2659014

KEYWORDS: Optical vortices, Gold, Nanoparticles, Laser applications, Gaussian beams, Liquids, Wavefronts, Printing, Glasses, Electronic components

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Proceedings Article | 27 October 2021 Paper

Spectroscopic polarization measurement and control using channeled spectrum

Kazuhiko Oka, Keisaku Yamane, Moritsugu Sakamoto, Ryuji Morita

Proceedings Volume 11927, 119270N (2021) https://doi.org/10.1117/12.2616272

KEYWORDS: Polarization, Wave plates, Spectroscopy, Polarimetry, Modulation, Ultrafast phenomena, Polarization control, Spectroscopes, Ultrafast laser spectroscopy, Head

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Proceedings Article | 15 June 2020 Paper

Silicon (111) chiral structures fabricated by illumination of optical vortex

Ablimit Ablez, Katsuhiko Miyamoto, Ryuji Morita, Takashige Omatsu

Proceedings Volume 11522, 1152219 (2020) https://doi.org/10.1117/12.2573778

KEYWORDS: Silicon, Optical vortices, Picosecond phenomena, Crystals, Spiral phase plates, Scanning electron microscopy, Applied physics, Laser ablation, Wavefronts, Phase shifts

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Proceedings Article | 15 June 2020 Paper

Ultrafast azimuth rotation of linearly polarized beam by use of a chirped optical pulse pair

Rin Sasaki, Keisaku Yamane, Kazuhiko Oka, Yasunori Toda, Takashige Omatsu, Ryuji Morita

Proceedings Volume 11522, 1152205 (2020) https://doi.org/10.1117/12.2573525

KEYWORDS: Polarization, Ultrafast phenomena, Polarization control, Terahertz radiation, Spatial light modulators, Polarimetry, Wave plates, Beam splitters, Applied physics, Mechanical engineering

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Proceedings Article | 22 February 2018 Presentation + Paper

Generation of arbitrary axisymmetrically polarized pulses with a broadband spectrum

Ryuji Morita, Masato Suzuki, Keisaku Yamane, Kazuhiko Oka, Yasunori Toda

Proceedings Volume 10549, 105490P (2018) https://doi.org/10.1117/12.2294491

KEYWORDS: Polarization, Spatial light modulators, Amplitude modulation, Modulation, Interferometers, Elliptical polarization, Fringe analysis, Dispersion, Wave plates

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Proceedings Article | 18 April 2017 Paper

Single orbital angular momentum mode emission from vertical cavity surface emitting laser by optical feedback

Y. Toda, H. Moriya, K. Shigematsu, K. Yamane, R. Morita, Y. Awaji

Proceedings Volume 10252, 102520A (2017) https://doi.org/10.1117/12.2275652

KEYWORDS: Vertical cavity surface emitting lasers, Laser optics, Optical vortices, Computer generated holography, Diffraction, Spatial light modulators, Gaussian beams, Semiconductor lasers, Gallium, Applied physics, Communication and information technologies

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Proceedings Article | 18 April 2017 Paper

Plasmonic Au nano-needle fabricated by optical vortex laser illumination

Kai Izumisawa, Tatsuyuki Sugimoto, Yuri Nakamura, Katsuhiko Miyamoto, Tsukasa Torimoto, Ryuji Morita, Takashige Omatsu

Proceedings Volume 10252, 102520I (2017) https://doi.org/10.1117/12.2275234

KEYWORDS: Metals, Pulsed laser operation, Optical manipulation, Materials processing, Gold, Optical vortices, Plasmonics, Nanolithography, Laser optics, Laser processing

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Proceedings Article | 18 April 2017 Paper

Creating a crystalline silicon (111) needle by optical vortex illumination

Kai Izumisawa, Ablimit Ablez, Yuri Nakamura, Tatsuyuki Sugimoto, Honami Fujiwara, Katsuhiko Miyamoto, Ryuji Morita, Takashige Omatsu

Proceedings Volume 10252, 102520O (2017) https://doi.org/10.1117/12.2275027

KEYWORDS: Picosecond phenomena, Photonic crystals, Semiconductor lasers, Photonic crystal devices, Laser crystals, Spiral phase plates, Solar energy, Crystals, Silicon, Optical vortices, Laser processing

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Proceedings Article | 18 April 2017 Paper

Generation of intense ultrafast-rotating ring-shaped optical lattices with programmable control of rotational symmetry

Keisaku Yamane, Kohei Iwasa, Kohei Kakizawa, Kazuhiko Oka, Yasunori Toda, Ryuji Morita

Proceedings Volume 10252, 102520F (2017) https://doi.org/10.1117/12.2275015

KEYWORDS: Terahertz radiation, Optical amplifiers, Spatial light modulators, Ultrafast phenomena, Optical damage, Sapphire lasers, Picosecond phenomena, Optical testing, Optical vortices, Computer generated holography

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Proceedings Article | 25 February 2014 Paper

Ultrafast and ultra-broadband optical-vortex pulse generation and characterization

Ryuji Morita, Keisaku Yamane, Zhili Yang, Yasunori Toda

Proceedings Volume 8999, 89990X (2014) https://doi.org/10.1117/12.2036919

KEYWORDS: Polarization, Ultrafast phenomena, Spatial light modulators, Oscillators, Computer generated holography, Mirrors, Femtosecond phenomena, Wave plates, Optical amplifiers, Beam splitters

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Proceedings Article | 11 February 2012 Paper

Diffraction characteristics of optical and polarization vortices generated by an axially symmetric polarizer

Moritsugu Sakamoto, Kazuhiko Oka, Ryuji Morita

Proceedings Volume 8274, 827414 (2012) https://doi.org/10.1117/12.910108

KEYWORDS: Polarization, Diffraction, Optical vortices, Near field diffraction, Spiral phase plates, Polarizers, Optical simulations, Superposition, Numerical simulations, Collimation

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Proceedings Article | 1 December 1990 Paper

Frequency doubling of laser diode light in organic channel waveguides

Takashi Kondo, Naoki Hashizume, Seiro Miyoshi, Ryuji Morita, Nagaatsu Ogasawara, Shinsuke Umegaki, Ryoichi Ito

Proceedings Volume 1337, (1990) https://doi.org/10.1117/12.22929

KEYWORDS: Channel waveguides, Second-harmonic generation, Crystals, Semiconductor lasers, Waveguides, Nonlinear crystals, Glasses, Organic materials, Planar waveguides, Cerenkov radiation imaging

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Showing 5 of 13 publications

Conference Committee Involvement (9)